@TechReport{ehrig_et_al:DagSemRep.218,
  author =	{Ehrig, Hartmut and Engels, Gergor and Orejas, Fernando and Wirsing, Martin},
  title =	{{Semi-Formal and Formal Specification Techniques for Software Systems (Dagstuhl Seminar 98281)}},
  pages =	{1--40},
  ISSN =	{1619-0203},
  year =	{1998},
  type = 	{Dagstuhl Seminar Report},
  number =	{218},
  institution =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagSemRep.218},
  URN =		{urn:nbn:de:0030-drops-151043},
  doi =		{10.4230/DagSemRep.218},
}